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1988 Map of Mount Jefferson

Name: 1988 Topographic Map of Mount Jefferson
Creator: U.S. Geological Survey
Published: 1988
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1988

About this map

The Montana Idaho Continental Divide carves a high-altitude boundary across this terrain, where the northern slopes of the Centennial Mountains meet the high plains of the Centennial Valley. Significant land management efforts are evident throughout the landscape, most notably the United States Sheep Experiment Station and the eastern edge of the Red Rock Lakes Nat Wildlife Rfg. These federal designations underscore the region's importance for both agricultural research and conservation at the headwaters of Red Rock Creek.

Deep in the high country, landmarks like Mount Jefferson and Nemesis Mountain tower over the Alaska Basin, providing a topographic record of the drainage systems that feed into both the Pacific and Atlantic watersheds. The map documents numerous remote water sources such as Fruin Spring, Lillian Lake, and Horsemint Spring, which supported livestock and wildlife before the turn of the 21st century. High-altitude crossings like Red Rock Pass and Squaw Pass mark the traditional routes through the Beaverhead Mountains and Targhee National Forest.